Hayward O-Ring for ProSeries 23" Sand Filter W3S200 | SX200Z3 UHDSR50 Fully programmable control with a

Fully programmable control with a self-contained 24-hour clock and up to 8 custom speed/timer functions with day-of-week scheduling

which are a common secondary cause of sand returning to the pool

The Hayward Check Valve (ECX4077B1) is the OEM replacement check valve for select StarClear cartridge filters and Perflex Extended-Cycle DE filters

When servicing the heat exchanger

Hayward O-Ring for ProSeries 23" Sand Filter W3S200 | SX200Z3 UHDSR50 Fully programmable control with aThe Hayward O Ring (SX200Z3) is the OEM replacement sealing O ring for the ProSeries 23" Top Mount Sand Filter. IMPORTANT: LUBRICATION REQUIRED SOLD SEPARATELY Always lubricate this O ring with a silicone based lubricant before installation to ensure a proper seal and prevent premature cracking. Browse our Pool Plumbing Lubricants for a compatible silicone lubricant. This O ring maintains a watertight seal at its designated seating point on the